The system collects solid wastes—such as undigested food, intestinal bacteria, and old cells—and removes them from the body, while the system filters the blood and collects wastes to remove from the body as urine.

Excretory system, and Kidney.

Explanation:

The excretory system helps to regulate the chemical composition of the body fluids by removing metabolic waste such as undigested food, intestinal bacteria, and old cells and helping to retain the proper amount of water, nutrients, and salts in the body.

The main function of the kidney is to filter the blood, kidney help to remove waste from the body as urine, control fluid balance in the body, and keep the right level of electrolytes. Each kidney is bean-shaped in structure and 4-5 inches long in size.

a) the particles of the chair are strongly held together.

the answer is b. dilution